CN114804544A - Method for purifying sewage of livestock and poultry farm - Google Patents
Method for purifying sewage of livestock and poultry farm Download PDFInfo
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- CN114804544A CN114804544A CN202210614620.9A CN202210614620A CN114804544A CN 114804544 A CN114804544 A CN 114804544A CN 202210614620 A CN202210614620 A CN 202210614620A CN 114804544 A CN114804544 A CN 114804544A
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- 238000000034 method Methods 0.000 title claims abstract description 100
- 239000010865 sewage Substances 0.000 title claims abstract description 94
- 244000144972 livestock Species 0.000 title claims abstract description 19
- 244000144977 poultry Species 0.000 title claims abstract description 18
- 238000011282 treatment Methods 0.000 claims abstract description 76
- 239000000126 substance Substances 0.000 claims abstract description 29
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 28
- 231100000719 pollutant Toxicity 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000000746 purification Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 6
- 238000010790 dilution Methods 0.000 claims abstract description 5
- 239000012895 dilution Substances 0.000 claims abstract description 5
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 5
- 230000000704 physical effect Effects 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims abstract description 4
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 229910001868 water Inorganic materials 0.000 claims description 32
- 238000001914 filtration Methods 0.000 claims description 25
- 244000005700 microbiome Species 0.000 claims description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 24
- 229910052698 phosphorus Inorganic materials 0.000 claims description 24
- 239000011574 phosphorus Substances 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 18
- 239000002351 wastewater Substances 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 241000894006 Bacteria Species 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000008901 benefit Effects 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 238000013517 stratification Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 210000002700 urine Anatomy 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- 102000004190 Enzymes Human genes 0.000 claims description 3
- 108090000790 Enzymes Proteins 0.000 claims description 3
- 206010021143 Hypoxia Diseases 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 239000013543 active substance Substances 0.000 claims description 3
- 241001148470 aerobic bacillus Species 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 238000006065 biodegradation reaction Methods 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 3
- 230000000249 desinfective effect Effects 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000004060 metabolic process Effects 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 235000015097 nutrients Nutrition 0.000 claims description 3
- 125000001477 organic nitrogen group Chemical group 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000002910 solid waste Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 241001465754 Metazoa Species 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a method for purifying sewage of livestock and poultry farms, which belongs to the technical field of sewage of livestock and poultry farms and comprises the following steps of S1 and a physical treatment method; s2, chemical treatment; s3, biological treatment; s4, other processing method, the physical processing method including: the method is characterized in that the method utilizes physical action to separate pollutants which are mainly in a suspension state in the sewage, and does not change the chemical properties in the treatment process, and the chemical treatment method comprises the following steps: separation is achieved by chemical reaction and mass transfer. The invention is ingenious in design, adopts the combination of chemical treatment method, dilution, disinfection and neutralization, and conveniently solves the problem that the existing purification method cannot decompose the pollutants in the sewage when in use, so that the sewage is not pure enough after treatment.
Description
Technical Field
The invention relates to a purification method, relates to the technical field of sewage of livestock and poultry farms, and particularly relates to a purification method of sewage of livestock and poultry farms.
Background
The sewage of the farm mainly comprises animal urine, partial animal excrement and feeding house flushing water, belongs to high-concentration organic sewage, and the content of suspended solids and ammonia nitrogen is large, after the untreated sewage enters a natural water body, the content of solid suspended solids, organic matters and microorganisms in the water is increased, the physical, chemical and biological community composition of the water body is changed, the water quality is deteriorated, a large amount of pathogenic microorganisms are contained in the sewage and can be diffused and spread through the water body or aquatic animals and plants, the health of people and livestock is harmed, the three of economic benefit, social benefit and environmental benefit are organically combined, enterprises can walk a sustainable development road, and the sewage of the enterprises must be effectively treated. The following problems exist in the prior art:
1. in the prior art, when the existing purification method is used, pollutants in sewage cannot be decomposed, so that the sewage is not pure enough after being treated;
2. in the prior art, harmful microorganisms in sewage cannot be eliminated in the using process of the existing purification method, so that the problem of insufficient significant sewage treatment effect is caused, the original use purpose of the purification method cannot be achieved, the applicability of the purification method is poor, and therefore structural innovation is required to solve specific problems.
Disclosure of Invention
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for purifying sewage from livestock and poultry farm comprises the following steps of S1, physical treatment; s2, chemical treatment; s3, biological treatment; s4, other processing methods;
the physical treatment method comprises the following steps: the method is characterized in that the method separates pollutants mainly in a suspension state from the sewage by utilizing physical action, and does not change the chemical properties of the pollutants in the sewage in the treatment process;
the chemical treatment method comprises the following steps: a wastewater treatment method for separating and removing pollutants in a dissolved or colloidal state in wastewater or converting the pollutants into harmless substances through chemical reaction and mass transfer;
the biological treatment method comprises the following steps: under the condition of oxygen deficiency, the activity of anaerobic microorganisms is utilized to decompose organic matters in the solid waste into methane, carbon dioxide, hydrogen sulfide, ammonia and water, and the biological treatment method has the advantages of high efficiency, low operating cost and the like;
the other treatment method comprises the following steps: the mixed liquid after the purification action of the activated sludge enters a secondary sedimentation tank, the suspended activated sludge and other solid matters in the mixed liquid are precipitated and separated from water, and the clarified sewage is discharged out of the system as treated water.
The technical scheme of the invention is further improved as follows: the physical treatment method comprises the following steps: grating, filter screen and filtration sediment, chemical treatment includes: diluting, disinfecting and neutralizing, wherein the biological treatment method comprises the following steps: decomposing and transforming, and other treatment methods comprise: activated sludge treatment, biological filtration, biological stratification and common filtration.
The technical scheme of the invention is further improved as follows: the grid and the filter screen: utilize grid, filter screen and septic tank to carry out the physical treatment of earlier stage, get rid of the suspended solid and deposit, can effectively filter the solid matter more than 50% in the sewage, send into the filtering pond through sewage pipes with the waste water of plant, the filtering pond divides two grids to get rid of impurity such as solid excrement and urine in the waste water, thereby reduce the processing load of follow-up technology.
The technical scheme of the invention is further improved as follows: and (3) filtering and precipitating: a screening device is respectively arranged in each grid; the screening device uses a stainless steel wire mesh, and a sand filter device is arranged at the bottom of the pool close to one end of the outlet, so that accumulated water is filtered when the pools are alternately used, and solid residues filtered by the screening device are manually cleaned and transported and are treated together with excrement and slag every day.
The technical scheme of the invention is further improved as follows: the chemical treatment method comprises the following steps: the method mainly utilizes the chemical reaction principle to dissolve substances or solidify pollutants according to the composition of the pollutants in the sewage, and utilizes chloride to disinfect water, such as pouring ferric chloride into the sewage to concentrate impurities, thereby achieving the purpose of purifying water quality.
The technical scheme of the invention is further improved as follows: the dilution, disinfection and neutralization: the sewage treatment device is lifted to an anaerobic tank through a water taking pump, phosphorus is mainly released in the anaerobic tank, the concentration of phosphorus in sewage is improved, the BOD5 and the ammonia nitrogen concentration in the sewage are reduced by the action of activated sludge, then the wastewater flows into an anoxic tank, denitrifying bacteria in the activated sludge reduce nitrified nitrogen in the sewage into nitrogen, the change of the concentration of the phosphorus in the process is very small, then the phosphorus enters an aerobic tank, organic nitrogen is aminated and then nitrified under the action of the aerobic bacteria, the ammonia nitrogen concentration can be reduced, the excessive information of phosphorus accumulating bacteria in the nitrification treatment process and the phosphorus in the water are absorbed, so that the phosphorus accumulating bacteria has the concentration to rapidly develop and descend, the sludge in the two sludge tanks is discharged into a sludge concentration tank through a sludge pump, and the phosphorus in the sewage is discharged and removed through the sludge.
The technical scheme of the invention is further improved as follows: the biological treatment method comprises the following steps: decomposing and converting pollutants in the wastewater by using metabolism of microorganisms under the catalysis of enzymes, wherein the decomposing and converting comprises the following steps: the method is characterized in that pollutants in the sewage are decomposed by using microorganisms, activated sludge containing bacteria and microorganisms is added into the sewage by the microorganisms, air is added into the sewage, and the purpose of purifying the sewage is achieved by the activated sludge through physical adsorption, biodegradation and other modes. The method is the most environment-friendly and thorough mode, and can promote active substances and nutrient solution of microorganisms, so that the decomposition of the microorganisms is accelerated.
The technical scheme of the invention is further improved as follows: the method comprises the following steps of activated sludge treatment, biological filtration, biological stratification and common filtration: the biological membrane process for treating sewage consists of biological filter, biological rotating disc, biological contact oxidizing pond, biological fluidized bed, etc. and has one layer of filtering material with surface filled with biological membrane and great amount of microbes degrading and oxidizing to reach the aim of treating sewage.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
1. the invention provides a purification method of sewage in livestock and poultry farms, which is ingenious in design and combines chemical treatment method, dilution, disinfection and neutralization, so that the problem that the existing purification method cannot decompose pollutants in the sewage when in use, and the sewage is not pure enough after treatment is conveniently solved.
2. The invention provides a method for purifying sewage of livestock and poultry farms, which can solve the problem that harmful microorganisms in the sewage cannot be eliminated in the using process of the existing purifying method and the sewage treatment effect is not obvious enough by adopting a biological treatment method, decomposition and conversion combination.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
The invention provides a method for purifying sewage of livestock and poultry farms, which comprises the following steps of S1, a physical treatment method; s2, chemical treatment; s3, biological treatment; s4, other processing method, the physical processing method including: the method is characterized in that the method utilizes physical action to separate pollutants which are mainly in a suspension state in the sewage, and does not change the chemical properties in the treatment process, and the chemical treatment method comprises the following steps: a wastewater treatment process for separating, removing or converting pollutants in a dissolved, colloidal state in wastewater into harmless substances by chemical reactions and mass transfer, said biological treatment process comprising: the biological treatment method has the advantages of high efficiency, low running cost and the like by decomposing organic matters in the solid waste into methane, carbon dioxide, hydrogen sulfide, ammonia and water by using the activity of anaerobic microorganisms under the condition of oxygen deficiency, and the other treatment methods comprise the following steps: the mixed liquid after the purification of the activated sludge enters a secondary sedimentation tank, the activated sludge and other solid matters suspended in the mixed liquid are precipitated and separated from water, and the clarified sewage is discharged out of the system as treated water, wherein the physical treatment method comprises the following steps: grating, filter screen and filtration sediment, chemical treatment includes: diluting, disinfecting and neutralizing, wherein the biological treatment method comprises the following steps: decomposing and transforming, and other treatment methods comprise: activated sludge treatment, biofiltration, biological layering, ordinary filtration, grid and filter screen: utilize grid, filter screen and septic tank to carry out the physical treatment of earlier stage, get rid of the suspended solid and deposit, can effectively filter the solid matter more than 50% in the sewage, send into the filtering pond through sewage pipes with the waste water of plant, the filtering pond divides two grids to get rid of impurity such as solid excrement and urine in the waste water, thereby reduce the processing load of follow-up technology, the filtration is depositd: a screening device is respectively arranged in each grid; the screening device uses a stainless steel wire mesh, and a sand filter device is arranged at the bottom of the pool close to one end of the outlet, so that accumulated water is filtered when the pools are alternately used, and solid residues filtered by the screening device are manually cleaned and transported and are treated together with excrement and slag every day.
Example 2
On the basis of embodiment 1, the invention provides a technical scheme that: the chemical treatment method comprises the following steps: mainly utilize the chemical reaction principle, come dissolving substance or solidification pollutant according to the composition of pollutant in the sewage, utilize the chloride to carry out water disinfection, for example pour into concentrated impurity in the sewage with ferric chloride to reach the purpose of purifying water quality, dilute, disinfect, neutralize: the sewage treatment method comprises the following steps of (1) pumping water to an anaerobic tank, wherein phosphorus is mainly released in the anaerobic tank, so that the concentration of phosphorus in sewage is improved, the BOD5 and ammonia nitrogen concentration in sewage are reduced by the action of activated sludge, then the wastewater flows into an anoxic tank, denitrifying bacteria in the activated sludge reduce nitrified nitrogen in the sewage into nitrogen, the change of the concentration of phosphorus in the process is very small, then the wastewater enters an aerobic tank, organic nitrogen is aminated and then nitrified under the action of the aerobic bacteria, so that the ammonia nitrogen concentration can be reduced, the excessive information of phosphorus accumulating bacteria in the nitrification treatment process and phosphorus in the water are absorbed, so that the phosphorus accumulating bacteria and the phosphorus in the water have the concentration to be rapidly developed and reduced, the sludge in two sludge tanks is discharged into a sludge concentration tank through sludge pumps, and the phosphorus in the sewage is discharged and removed through sludge, and the biological treatment method comprises the following steps: decomposing and converting pollutants in the wastewater by using metabolism of microorganisms under the catalysis of enzymes, wherein the decomposing and converting comprises the following steps: the method is characterized in that pollutants in the sewage are decomposed by using microorganisms, activated sludge containing bacteria and microorganisms is added into the sewage by the microorganisms, air is added into the sewage, and the purpose of purifying the sewage is achieved by the activated sludge through physical adsorption, biodegradation and other modes. The method is the most environment-friendly and thorough mode, can promote active substances and nutrient solution with microbial activity, so as to accelerate the decomposition of the microorganisms, and comprises the following steps of activated sludge treatment, biological filtration, biological stratification and common filtration: the biological membrane process for treating sewage consists of biological filter, biological rotating disc, biological contact oxidizing pond, biological fluidized bed, etc. and has one layer of filtering material with surface filled with biological membrane and great amount of microbes degrading and oxidizing to reach the aim of treating sewage.
The invention has the beneficial effects that: by the delicate design and the combination of chemical treatment, dilution, disinfection and neutralization, the problems that when the existing purification method is used, can not decompose the pollutants in the sewage, so that the sewage is not pure enough after being treated, through the combination of the structures, the purification method can decompose and eliminate pollutants in the sewage by utilizing chemical treatment when in use, and the water source is disinfected, which is beneficial to improving the purity of the water source, and the biological treatment method, the decomposition and the conversion are combined, can solve the problem that the prior purification method can not eliminate harmful microorganisms in the sewage in the using process, which causes the sewage treatment effect to be not obvious enough, through the combination of the structures, harmful microorganisms in the sewage can be eliminated when the purification method is used, and the sewage treatment effect is effectively improved.
The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.
Claims (8)
1. A method for purifying sewage from livestock and poultry farm comprises the following steps of S1, physical treatment; s2, chemical treatment; s3, biological treatment; s4, other processing methods;
the physical treatment method comprises the following steps: the method is characterized in that the method separates pollutants mainly in a suspension state from the sewage by utilizing physical action, and does not change the chemical properties of the pollutants in the sewage in the treatment process;
the chemical treatment method comprises the following steps: a wastewater treatment method for separating and removing pollutants in a dissolved or colloidal state in wastewater or converting the pollutants into harmless substances through chemical reaction and mass transfer;
the biological treatment method comprises the following steps: under the condition of oxygen deficiency, the activity of anaerobic microorganisms is utilized to decompose organic matters in the solid waste into methane, carbon dioxide, hydrogen sulfide, ammonia and water, and the biological treatment method has the advantages of high efficiency, low operating cost and the like;
the other treatment method comprises the following steps: the mixed liquid after the purification action of the activated sludge enters a secondary sedimentation tank, the suspended activated sludge and other solid matters in the mixed liquid are precipitated and separated from water, and the clarified sewage is discharged out of the system as treated water.
2. The method for purifying sewage of livestock and poultry farm according to claim 1, characterized in that: the physical treatment method comprises the following steps: the chemical treatment method comprises the following steps: diluting, disinfecting and neutralizing, wherein the biological treatment method comprises the following steps: decomposing and transforming, and other treatment methods comprise: activated sludge treatment, biological filtration, biological stratification and common filtration.
3. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: the grid and the filter screen: utilize grid, filter screen and septic tank to carry out the physical treatment of earlier stage, get rid of the suspended solid and deposit, can effectively filter the solid matter more than 50% in the sewage, send into the filtering pond through sewage pipes with the waste water of plant, the filtering pond divides two grids to get rid of impurity such as solid excrement and urine in the waste water, thereby reduce the processing load of follow-up technology.
4. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: and (3) filtering and precipitating: a screening device is respectively arranged in each grid; the screening device uses a stainless steel wire mesh, and a sand filter device is arranged at the bottom of the pool close to one end of the outlet, so that accumulated water is filtered when the pools are alternately used, and solid residues filtered by the screening device are manually cleaned and transported and are treated together with excrement and slag every day.
5. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: the chemical treatment method comprises the following steps: the method mainly utilizes the chemical reaction principle to dissolve substances or solidify pollutants according to the composition of the pollutants in the sewage, and utilizes chloride to disinfect water, such as pouring ferric chloride into the sewage to concentrate impurities, thereby achieving the purpose of purifying water quality.
6. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: the dilution, disinfection and neutralization: the sewage treatment device is lifted to an anaerobic tank through a water taking pump, phosphorus is mainly released in the anaerobic tank, the concentration of phosphorus in sewage is improved, the BOD5 and the ammonia nitrogen concentration in the sewage are reduced by the action of activated sludge, then the wastewater flows into an anoxic tank, denitrifying bacteria in the activated sludge reduce nitrified nitrogen in the sewage into nitrogen, the change of the concentration of the phosphorus in the process is very small, then the phosphorus enters an aerobic tank, organic nitrogen is aminated and then nitrified under the action of the aerobic bacteria, the ammonia nitrogen concentration can be reduced, the excessive information of phosphorus accumulating bacteria in the nitrification treatment process and the phosphorus in the water are absorbed, so that the phosphorus accumulating bacteria has the concentration to rapidly develop and descend, the sludge in the two sludge tanks is discharged into a sludge concentration tank through a sludge pump, and the phosphorus in the sewage is discharged and removed through the sludge.
7. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: the biological treatment method comprises the following steps: decomposing and converting pollutants in the wastewater by using metabolism of microorganisms under the catalysis of enzymes, wherein the decomposing and converting comprises the following steps: decomposing pollutants in the sewage by using microorganisms, adding activated sludge containing bacteria and microorganisms into the sewage by using the microorganisms, simultaneously adding air into the sewage, and purifying the sewage by using the activated sludge in modes of physical adsorption, biodegradation and the like; the method is the most environment-friendly and thorough mode, and can promote active substances and nutrient solution of microorganisms, so that the decomposition of the microorganisms is accelerated.
8. The method for purifying sewage of livestock and poultry farms according to claim 2, characterized in that: the method comprises the following steps of activated sludge treatment, biological filtration, biological stratification and common filtration: the biological membrane process for treating sewage consists of biological filter, biological rotating disc, biological contact oxidizing pond, biological fluidized bed, etc. and has one layer of filtering material with surface filled with biological membrane and great amount of microbes degrading and oxidizing to reach the aim of treating sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210614620.9A CN114804544A (en) | 2022-06-01 | 2022-06-01 | Method for purifying sewage of livestock and poultry farm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210614620.9A CN114804544A (en) | 2022-06-01 | 2022-06-01 | Method for purifying sewage of livestock and poultry farm |
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| CN114804544A true CN114804544A (en) | 2022-07-29 |
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| CN202210614620.9A Pending CN114804544A (en) | 2022-06-01 | 2022-06-01 | Method for purifying sewage of livestock and poultry farm |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6039874A (en) * | 1997-10-07 | 2000-03-21 | Ajt & Associates, Inc. | Apparatus and method for purification of agricultural animal waste |
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